I can personally vouch for rEFInd, having used it for well over a decade. Once installed, it becomes the initial UEFI boot manager and effectively chainloads Grub. Grub remains managed by the OS itself, but as @linux-aarhus suggests, there is also an option offerred which bypasses Grub completely, and boots via the kernel stub.
rEFInd is configured from one file – the defaults are quite sane.
In fact, it’s likely all that you might want to change is the timeout and the theme. The file is well documented behind # comments.
sudo nano /boot/efi/EFI/refind/refind.conf
You will find links to some rEFInd themes toward the end of this related tutorial:
Regards.